I will assume that the proposed banner meets exemption criteria 6.6.d (e.g. a name-only ad). There should not be an issue linking such banner to the complete/unedited product monograph in a website gated for health care professionals.
In a non-gated site (i.e. accessible to consumers), linking the product monograph for a prescription drug to advertising for that product would contravene section C.01.044 of the Food and Drugs Regulations (even if the ad itself does not go beyond name, price, and quantity). It is important to note that although the complete/unedited product monograph does indeed go beyond the name/price/quantity, it is not considered advertising unless it is somehow linked to advertising. Please call the PAAB office if you need further guidance on this matter.